2100022221 has 16 divisors (see below), whose sum is σ = 3060822528. Its totient is φ = 1270138800.

The previous prime is 2100022217. The next prime is 2100022229. The reversal of 2100022221 is 1222200012.

It is not a de Polignac number, because 2100022221 - 2² = 2100022217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2100022197 and 2100022206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100022229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48601 + ... + 81006.

It is an arithmetic number, because the mean of its divisors is an integer number (191301408).

Almost surely, 2^2100022221 is an apocalyptic number.

It is an amenable number.

2100022221 is a deficient number, since it is larger than the sum of its proper divisors (960800307).

2100022221 is a wasteful number, since it uses less digits than its factorization.

2100022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130112.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2100022221 is about 45825.9993999040. Note that the first 3 decimals coincide. The cubic root of 2100022221 is about 1280.5836817572.

Adding to 2100022221 its reverse (1222200012), we get a palindrome (3322222233).

The spelling of 2100022221 in words is "two billion, one hundred million, twenty-two thousand, two hundred twenty-one".